Machine for straightening metal bars.



L. H. BRIGHTMAN. MAGEI'NE PORSTRAIGHTENING METAL BARS. AYPLIGATION FILED JAN. 16, 1911, v 1,915,473, Patented Jaln;.1912. i

wif@ eme/S.'

L. H. BRIGHTMAN. MACHINE FORSTRAIGHTENING METAL BARS.

APPLICATION FILED JAN.16,1911. 1,015,478. PQJLGDBLBJIL 23, 1912.

51 SHEETS-SHEET 2.

L. H. BRIGHTMAN. MAoHlNE FOR STRMGETENING METAL BARS.

AFPLIGATION FILED JAN. 16, 1911.

Patented Jan.23,' 1912.

4 SHEETS-SHEET 3.

L. H. BRIGHTMAN. MACHINE EUR STRAIGHTENING METAL. BARS.

l APLIGi-KTION FILED JAN.16,1911. 1,015,473.

CIT

LATI-IAM H. BRIGHTMAN, 0F LAKEWOOD, OHIO.

MACHINE FOR STRAGHTENING METAL BARS.

roi 5,1m:

Specification of Letters Patent.

' Patented Jan.. 23.1912.

Application filed January 16, 1911. Serial N0.602,773.

To all whom it may concern:

Be it known that l. Lyman lvl. BRIGHT MAN, a citizen otthc United States ot' America, residing at Lakewood, in the county ot' Cuyahoga and State of (tibio, have invented certain new and useful lmjnove-v monts in Machines for Straightening Metal liars: and l hereby declare the following to be a tullv` clear, and exact description of the invention` such as will enable others skilled in the art to which it pertainsl to malte and use the same.

This invention relates to new and useful improvements in machines tor straightening ing metal bars ot' angular cross-section which will remove both the longitudinal curvature and also any twist that there may be in the bar.

r.lhe invention, therefore. consists particularly in providing in a machine ot' this characier a j ilurality ot straightening dies freely supported in a iiier trame adapted to be revolved around said dies and means carried by said Aliier trame 'for holding said dies vagainst, rotation on their own axes while the said flier traine 1s being revolved.

The invention also consists in the t'ez.- tures ol construction and combination oi parts described in the specification, pointed out in the claims and illustrated in the acconn'ianying drawings.

ln the accompanying drawings Figure 1 is a top plan ot a straightening machine embodying my invention. Fig. 2 is a side ele- 'vation ol the same. Fig. 23 is an enlarged detail view mostly in central section showing the iiier frame and the bearing and standard at one end thereof. Fig. Jr is a section on line 4 4, Fig, 3. Fig. 5 is a diagram illustrating the 'positions assumed by the portion ot the bar passing through the ecceiitrically arranged straightening dios.

ln general a machine embodying the invention' comprises a flier frame ot the `usual rectangular shape which is revolubly supported on suitable standards by means o hollow trunnions. The tlier frame is provided with a feed tube which is mounted in the hollow trunnion at the receiving end of the frame and is held against rotation by a rigid connection with the supporting tlrame and with a discharge tube which is rotatably mounted in a seat formed in the. hollow trunnion .at the discharge end of the filer frame. T he flier frame is provided with a plurality ofdies, which for convenience we may term the guide dies and the straighten- .ing dies. One guide die is rigidly secured in the inner end ot' the feed tube and the other guide dieis rigidly Secured in the inner end of the discharge tube. The straightening dies arey rotatably mounted in brackets which are arranged on the flier trame and are capable of adjustment both longitudinally and transversely thereof. By the longitudinal adjustmentot the brackets it is possible to space the straightening dies alongtthe iier frame as desired and by the transverse adjustment of the brackets it is possible to move thestraightem ing dies so that their axes are slightly out ot' line with the axis of the flier f1-ame. It is necessary in order to remove any twist which may be in the bar which is being straight ened andalso in order to prevent any torsional strain on the bar which might impart a twist thereto to holdthe dies against rota tion on their own axes and this is accom` plished as follows z-On the inner end ot'.- the feed tube and on the inner end oi' the discharge tube is rigidly secured a gear wheel and to each of the straightening dies is rigidly secured a gear wheel. At each side of the Hier trame, near each end thereof,.is mounted a shaft supporhand in the said shaft supports are rotatably niounted the ends of a pair of shafts which eixltend longitudinally of the flier 'frame at. each side thereof. On the ends of the said'shatts at the receiving end of the machine are rigidly mounted gear wheels which are arranged to mesh with the gear wheel on the feed tube, and onthe ends of said shafts at the discharge end of the machine are arranged gear wheels which mesh with the gear wheel on lthe discharge tube, and on said shafts intermediate of these gears are secured other gears, the gears on one shaft being arranged to mesh with the gears on the alternate straightening dies.l As will appear hereinafter more clearly, during the operation of the machine the gears on the said shafts will be positively driven by the rotation ot the said shafts and will also be revolved by the flier frame, and therefore the gears on the straightening dies will be positively held againstv movement and the straightening dies themselves Will-remain stationary.

lio'

hollow trunnion 13 by means of which the flier frame is revolubly mounted in the bearin s 1() in the said standards 9. The side members of the flier frame have flat faces,

shown at 14, kwhich face in opposite dii-eel# tions and are parallel to each other. In each face is formed a longitudinally extending 15 T-slot 15, the ends of the slot being enlarged, as shown at 16, to permit the insertion of the head of a bolt, as will be more fully explaned later. In. the hollow trunnlon at the receiving end of the machine is arranged `2o a guide tube 18 which'projects beyond the trunnion at both ends. The outer end ot said guide tube 18 has a {lange 19 and a plate 20 is rigidly secured to said flange 1S.)

and to the standard 9, by means of bolts 21,

they said plate having an opening 22 corresponding to the bore oie. the guide tube and .preferably slightly flaring at its outer end. llVit-hin the inner end of said guide tube 18 is rigidly secured a guide die 23 by means 3o of a set screw 24, the said guide die having an opening corresponding in cross section to the'cross section or' the rod which is to'be straightened. On the inner end et the guide tube 18 is .rigidly secured a gear wheel 25. In the opposite end of the tlier frame at the inner end of vthe bore inthe trunnion is 'formed a seat 26 in which is rotatably ar ranged a discharge tube 27. 'llie said tube 27 is held on the seat 26 by means of a col- 40 lar 28 which engages an annular flange 30 formed on said discharge tube and the said collar is rigidly secured to the flier frame y by screws 29.a In the inner end of the discharge tube is rigidly mounted a guide die .4.5 31, in all respects similar to the guide die 23. 0n the inner end ot the discharge tube is rigidly secured a gear wheel 232.

The bracket-s for supporting the straightening dies are all similar in construction and 5o each comprises a circular body portion 35, at diametrically opposite sides et which are arranged arms 36 which are provided at 1 their outer ends with longitudinal slots 37. The said arms are secured to the flier traine by means of bolts 3S, the heads of which are adapted to slide in the T-slot-s 15 formed in the liier iframe, and the said bolts 38 are pros vided with nuts 39 which clamp against the said. arms 36. It will therefore be seen that by loosening the nuts the said brackets can be adj usted. longitudinally oi the said 'frame i or transversely of the frame as desired. ln the body portion of ,each of the brackets rotatably mounted a sleeve 40, one end of which projects beyond tne body portion ot straight.

vthe die supports.

the bracket, and thereon is rigidly secured a gear wheel l1. In order to eliminate all iriction between the sleeve and its mounting in the said bracket a suitable ball bearing is employed, indicated at ln the sleeve ll() is rigidly secured a. die lil, similar in cross section to the guide dies. Y

At euch end of the tliei" frame, at each side thereot` are mounted shaft supports 45, and in said shaft supports are rotatably mounted the ends of shafts 47 which extend longitudinally from end to end of the said frame and parallel with each other. Near each end of each shaft. are rigidly secured gear wheels 48 and All) respectively which arc adapted to mesh with the respective gear wheels on the guide tube 18 and on the discharge tube 27, and'on said shafts t7 intermediate the end gear wheels are mounted gear wheels 50, the gear wheels on the shatts alternately engaging with the gear wheels 41 on the sleeves lo carrying the straightening dies 43.

Any suitable means for revolving the lier frame is provided, such as a pulley 5l rigidly secured on the trunnion at the let't hand side of the tlier frame as viewed in Fig. 2.

As before stated this machine is intended I for straightening metal bars, angular in cross section. ln practice the' bar to be straightened is 4fed through the machine by any suitable means, the bar passing first through the guide tube atthe receiving end, then through the str:tighteningA dies in the bracket and out through the guide tube at the discharge end. rlhe brackets carrying the straightening dies are adjusted as desired longitudinally ot the frame, and one or more thereof are adjusted transversely ot the traine so that the axes ot the dies therein will be slightly out ot line with the axial line of the frame. These dies, therefore, will be slightly eccentric with regard to the axis of the .tlier frame, and when the traine is revolved the portion of the bar carried by-the eccentric dies will be bent up and down and back and forth in all directions owing to the eccentric movement of said dies producing a .kneading action on the bar which 'renders the same absolutely lhile the bar is being thus knea ded by the action ot the eccentric dies it is necessary to prevent any rotation of the said dies kwhich would of course result in a torsional strain on the bar, tending to .twist the same, and this is secured by the intermeshing gears carried `by the shafts 47 which intermesh with the gears carried by It will be seen that. Ias the ilier iframel is revolved the gears 48 at 'the right hand end oit the shafts 47 as viewed in Fig 1 will be revolved owing lto their meshing with the gear 25 which is rigidly mounted on the stationary feed tube 18 and therefore the said shafts 47 are revolved and all the gears carried by said shafts will be revolved. The said gear yWheels will not only be. revolved with their respective shafts 47 but will also be carried around the gear wheels al on the die supports by the revolv.- ing of the flier frame and therefore the gear Wheels on the die supports Will be held absolutely stationary preventing any movementof the dies on their own axes.

-What l claim isf.

l. ln a machine of the character described, the combination of a bed, a lflier frame revolubly mounted on said bed, dies rotatably supported in said iiier frame and means for holding the dies against rotation on their own-axes while Ythe said tiier frame is being revolved. y

2. ln a machine of the character described, the combination of a bed, a flier frame revoubly mounted on said bed, means for revolving said ilier frame, brackets supported on said hier frame, dies journaled in said brackets with their axes parallel With the axis of the Hier frame and means carried by said flier frame for preventing the rotation of the dies on their own ases while the said dier frame is being revolved.

3, ln a machine of the character described, the combination of a bed, a flier frame revolubly mounted von said bed, guide dies arranged at each 'end'of said flier frame, a series of brackets mounted on said hier frame straightening dies 'ournaled in said" brackets with. their axes parallel with the aXis of the flier frame and means carried by said flier f'ame and adapted to engage with said straightening dies to prevent the rotation of said dies on their oWn axes While the flier frame is being revolved. p

41. ln a machine of the character described, the combination of a bed, standards mounted on said bed, a flier frame provided with hollow trunnions journalcd in said standards, guide dies arranged at each end of said tlier frame, a series of brackets mount ed on the flier frame and adjustable longitudinally and transversely thereof, straightening dies rotatably mounted in said brackets and means carried by the iier frame and operatively connected with said straightene ing dies for holding said straightening dies against rotation on their oWn axes while the flier frame is being revolved.

5. ln a machine of the charactei' described, the combination of ay stationary frame, a flier frame having hollow trunni'tms` joui naled ou said stationary frame, a series of brackets mounted in said flier frame, straightening dies rotatably mounted in said brackets, a gear Wheel `operatively connected with each die, a shaft rotatably supported on said flier frame, a series of gear Wheels secured on said shaft, the gear Wheels on said shaft being arranged to mesh With alternate gear Wheels connected with the `each shaft will mesh' with a gear Wheel connected 'to a strfdghtening die and means for rotating said shafts when the hier fame is revolved. ,l

7. 1n a machine of the cha 'acier described, the combination of a stationary frame, a flier frame having hollow trunnions journaled on said stationary frame, aiserics of brackets mounted on said flier frai e, straightening dies rotatably mounted in si id brackets and adjustable transversely of tlie flier frame, a gear operativcl y connected with each die, a shaft rotatably mounted on nach side of said flier frame, gear Wheels secured on `each of said shafts, the arrangement being such that each gea-r Wheel on each shaft will mesh with a gear wheel connected to a straightening die and means for rotating said shafts when the hier frame is revolved.

8. In a machine of the character described, the combination of a stationary frame, a flier frame journalcd 'on said stationary fra-me, agear wheel rigidly supported in lproximity to said flier frame, a series of4 brackets mounted on said Hier frame, straightening dies rotatably mounted in said bracket-s, a gear operatively connected with each die, a shaft rotatablv mounted on each side of said flier frame, gear Wheels secured on each of said shafts, the arrangement being such that onel gear Wheel on each shaft will .mesh with the said rigid gear Wheel and each of the other gear Wheels on said shafts will mesh with a gear Wheel connected to a straightening die and means for re volving said flier frame.

9. In a machine of the character described, the combination of a stationary frame, a flier frame having hollow trunnions journaled in saidstationary frame, a series of brackets mounted in said flier frame,

straightening dies rotatably mounted in said mesh with the gearwheel on Sejlfhtube and the hollow trunnion at the other end of said each ot' the other gear Wheels on` said shafts will. mesh with @gear Wheel connected to e straightening flieend lmeans .for revolvingseid lier'frame. l

l0. In machine olf the character described, the combination of e stationary frame, a Hier frame havingl hollow trunnions journalecl on said stationary frame, a feed tube arranged in the hollow trunnion at one end of said frame, at discharge tube arranged in frame, Ineens rigidly connecting the feed tube with the Stationary frame, guide dies arranged in said tubes, gear Wheels secured on thenner end of seid ubes, a series of brackets mounted on sai ier frame, e sleeve rotatably mounted in each bracket, a straightening die arranged in each sleeve, a.

gear Wheel rigidly secured on'euch sleeve. e. shaft rotatably mounted on each side of seid flier freine, gear Wheels secured on each of said shafts, the arrangement being such that the gear wheels et the ends of euch shaft will mesh with the geur wheels on the feed tube and the discharge tube, and euch of the intermediate gear wheels on each shaftwill mesh with a gear wheel on the sleeves in said brackets and means for revolving said flier frame.

In testimony whereof, I sign the foregoing specification, in the presence of two Witnesses.

LATHYAM H. BRIGHTMAN.

Witnesses:

Violon C. LYNCH, N. L. MCDONNELL. 

